Number of permutations p of [2n] such that in 0p the largest up-jump equals n and no down-jump is larger than 2.
A320290
Number of permutations p of [2n] such that in 0p the largest up-jump equals n and no down-jump is larger than 2.
Terms
- a(0) =1a(1) =1a(2) =9a(3) =156a(4) =3098a(5) =69274a(6) =1626122a(7) =39892080a(8) =1004867492a(9) =25886899652a(10) =677767802220
External references
- oeis: A320290